Thursday, February 12, 2009
Topic of the day:
HOW WILL THE UNIVERSE END??
Scientists or more specifically astrophysicists have long speculated that one day, our universe will end..
but how??
To understand the theory, we must understand that according to the 2nd law of thermodynamics, every matter tends to their disorder state, which means the entropy of a matter will always increase..
This is applicable to the universe as well..
so, the entropy of universe will always increase..
how will it end then?
There are three theories drawn up...
The first is the theory of BIG CRUNCH..
This theory states that as the universe expands, there will be a saturation point or maximum point..
and at this point, the universe will reach its limit and everything will be pulled back towards its origin resulting in the end of the universe..
This is just like a mini rocket propelled into the sky will get pulled back by the gravity..
so in this case, the universe will be pulled back by the forces of attraction from the centre which is essentially the black hole..
The second theory is known as the BIG CHILL..
In this case, as the universe expands, it is actually doing work against the forces of attraction from the black hole..
Thus, the universe is actually losing energy and this means the universe will get colder and colder until one point where everything will be cold and dark..
and hence, the end of the universe...
The third theory is related to the rate at which the universe expands..
It states that the rate of expansion of the universe is so great that it will rip apart everything to the smallest atoms and cause the universe to rupture..
WHICH ONE IS TRUE?
Astrophysicists around the world have been working on this research for quite some time...
and to help them in their research they give certain names to related forces existing in the universe..
Dark energy is defined as the forces responsible for the expansion of the universe (repulsive force)..
Dark matter is the one that exerts a pull on the universe (attractive force)..
To help prove the theories, the astrophysicists tried to find which one is the dominant force in the universe..
If dark matter dominates, the universe will be pulled back in the years ahead..
but if dark energy dominates, the universe will continue to expand and expand...
Rigorous researches show that dark energy dominates over the pull exerted by dark matter and so BIG CRUNCH is not feasible...
but mysteries remain whether BIG CHILL or rupture of the universe will explain how the universe is going to meet its end...
One thing for sure, though, the end is imminent...
Thanks to all the blogs i referred to (countless) for html code help :) (esp. cyn' and sixseven)
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